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Journal of Materials Engineering and Performance

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01-02-2010

Fatigue Crack Growth of Peened Friction Stir-Welded 7075 Aluminum Alloy under Different Load Ratios

Authors: Omar Hatamleh, Scott Forth, Anthony P. Reynolds

Published in: Journal of Materials Engineering and Performance | Issue 1/2010

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Abstract

The effect of peening on the fatigue crack growth performance of friction stir-welded 7075 aluminum alloy was investigated. The fatigue crack growth rates were assessed for laser- and shot-peening conditions at stress ratios (R) of 0.1 and 0.7. The surface and through thickness residual stress distributions were characterized for the different regions in the weld. The results indicate a significant reduction in fatigue crack growth rates using laser peening compared to shot peening and the as-welded condition. The effect of the compressive stresses obtained through laser peening was deemed responsible for increasing the resistance to fatigue crack growth of the welds.

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Title: Fatigue Crack Growth of Peened Friction Stir-Welded 7075 Aluminum Alloy under Different Load Ratios
Authors: Omar Hatamleh
Scott Forth
Anthony P. Reynolds
Publication date: 01-02-2010
Publisher: Springer US
Published in: Journal of Materials Engineering and Performance / Issue 1/2010
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-009-9439-1

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